Armstrong County weather alerts
There are no active weather alerts for Armstrong County, PA right now.
Since 2016 the National Weather Service has issued about 892 alerts that included Armstrong County, roughly 89 a year. The most common is the severe thunderstorm warning (318 from 2016 to 2025). The last tornado warning was issued on June 17, 2025. 11 tornadoes have touched down in the county since 1950.
Updated from the National Weather Service · lists refresh hourly; the live map loads current alerts directly from the NWS
No warnings, watches or advisories include Armstrong County at the moment. This page updates automatically when the National Weather Service issues one. Check neighboring Jefferson County, Clarion County, Indiana County, Butler County.
Armstrong County alert history
Alert events that included Armstrong County or its forecast zones, from the NWS warning archive.
| Alert type | 2016–2025 | 2026 | Last issued |
|---|---|---|---|
| Severe Thunderstorm Warning | 318 | 45 | October 16, 2026 |
| Winter Weather Advisory | 77 | 2 | March 16, 2026 |
| Severe Thunderstorm Watch | 69 | 14 | September 9, 2026 |
| Flash Flood Warning | 58 | 25 | September 13, 2026 |
| Flood Advisory | 54 | 0 | September 1, 2024 |
| Flood Warning | 42 | 13 | October 11, 2026 |
| Flood Watch | 34 | 9 | September 12, 2026 |
| Wind Advisory | 32 | 2 | March 15, 2026 |
| Dense Fog Advisory | 29 | 6 | August 21, 2026 |
| Frost Advisory | 27 | 2 | May 11, 2026 |
| Snow Squall Warning | 27 | 18 | March 17, 2026 |
| Freeze Warning | 24 | 6 | October 18, 2026 |
| Tornado Warning | 18 | 0 | June 17, 2025 |
| Freeze Watch | 13 | 4 | October 18, 2026 |
| Cold Weather Advisory | 13 | 8 | February 9, 2026 |
| Tornado Watch | 12 | 3 | June 14, 2026 |
| Winter Storm Watch | 10 | 1 | January 25, 2026 |
| Winter Storm Warning | 8 | 1 | January 25, 2026 |
| Heat Advisory | 8 | 3 | September 2, 2026 |
| High Wind Watch | 5 | 0 | December 23, 2022 |
| High Wind Warning | 3 | 1 | March 13, 2026 |
| Extreme Heat Watch | 3 | 0 | June 22, 2025 |
| Red Flag Warning | 2 | 0 | April 12, 2023 |
| Extreme Cold Warning | 2 | 3 | February 7, 2026 |
| Extreme Cold Watch | 2 | 2 | February 7, 2026 |
| Fire Weather Watch | 1 | 0 | April 12, 2023 |
| Ice Storm Warning | 1 | 0 | December 26, 2025 |
| Extreme Heat Warning | 0 | 1 | June 30, 2026 |
Tornado history in Armstrong County
11 tornadoes have been recorded in Armstrong County since 1950, injuring 144 people. That ranks 44 of 67 counties in Pennsylvania. The most recent was on March 31, 2022 (rated EF2).
Strongest tornadoes in Armstrong County
| Date | Rating | County | Path length | Width | Deaths | Injuries |
|---|---|---|---|---|---|---|
| June 3, 1980 | F4 | Allegheny County | 11.8 mi | 10 yd | 0 | 140 |
| June 27, 1951 | F2 | Armstrong County | 19.7 mi | 10 yd | 0 | 0 |
| March 31, 2022 | EF2 | Armstrong County | 8.6 mi | 350 yd | 0 | 0 |
| April 23, 1966 | F2 | Armstrong County | 1 mi | 17 yd | 0 | 0 |
| September 23, 1986 | F2 | Armstrong County | 0.5 mi | 40 yd | 0 | 1 |
Most recent tornadoes
| Date | Rating | County | Path length | Width | Deaths | Injuries |
|---|---|---|---|---|---|---|
| March 31, 2022 | EF2 | Armstrong County | 8.6 mi | 350 yd | 0 | 0 |
| June 16, 2019 | EF1 | Butler County | 1.5 mi | 400 yd | 0 | 0 |
| April 28, 2002 | F0 | Armstrong County | 4 mi | 150 yd | 0 | 0 |
| July 20, 1992 | F0 | Armstrong County | 0.5 mi | 20 yd | 0 | 0 |
| September 23, 1986 | F2 | Armstrong County | 0.5 mi | 40 yd | 0 | 1 |
About Armstrong County
- Population: 63,679 (2024 estimate)
- State: Pennsylvania
- NOAA Weather Radio SAME code: 042005 (how to use it)